What’s happening to our maples?
Thank you for your question. Maple trees are susceptible to a number of soil fungi, including verticillium wilt, which causes ‘flagging,’ the loss of the tree limb by limb. Here is a description of it: https://pnwhandbooks.org/plantdisease/host-disease/maple-acer-spp-verticillium-wilt You can get testing to diagnose the problem at the OSU Plant Clinic: https://bpp.oregonstate.edu/plant-clinic I hope this is helpful. Good luck!
Tree decline may be due to a number of reasons. This page from the PNW Handbook describes possibilities, and in a street tree situation like this, hiring a certified arborist to evaluate trees is generally recommended. https://pnwhandbooks.org/plantdisease/pathogen-articles/common/tree-decline https://pnwisa.org/hire-an-arborist/
I had a tree company come out and confirmed vert wilt, need to remove 3 trees and treat the remaining ones.
most of them have the problem on north side, away from the street. The same problem can be seen in neighborhood.